So I just picked up a 01 SS with 40k on the clock, the guy who was selling the car said it has a "Zo6" top end kit purchased and installed from a company in Texas.
Now from what I Can tell the car has K&N Air filter, "243" head castings, LS6 Intake, Mid length headers, Catless Y-pipe to the stock Dual Dual catback & Rear 02 sims. Everything else appears stock I cannot verify cam for obvious reasons but he did give me a hypertech programing unit and told me the pcm was flashed with it. The only gripe I have with the car is the programming through hypertech and that it keeps throwing code P0171 "Fuel System Lean Bank 1", P1133 "HO2S Insufficient Switching Bank 1 Sensor 1" & P1153 "HO2S Insufficient Switching Bank 2 Sensor 1". I understand the o2 codes are normal with headers but I have cleaned the maf hoping to eliminate P0171.
My #1 I plan to flash this car back to stock file with the hypertech but does anyone feel it can benefit from a mail order tune for the "Mods" or will it be ok running on the stock file? I don't plan to run this car hard I basically bought it for a street build to start taking place next Spring but until then I just want to enjoy it for what it is and make sure all it's potential is being used and the engine is safe.
I attached the Hypertech file so you can see the changes it made from stock.